Timothy Beight / Mbed 2 deprecated 6_songs-from-the-cloud

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Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of 6_songs-from-the-cloud by MakingMusicWorkshop

mbed-client/mbedtls/source/x509_csr.c@0:f7c60d3e7b8a, 2016-05-18 (annotated)

Committer:
maclobdell
Date:
Wed May 18 19:06:32 2016 +0000
Revision:
0:f7c60d3e7b8a
clean version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maclobdell 0:f7c60d3e7b8a 1 /*
maclobdell 0:f7c60d3e7b8a 2 * X.509 Certificate Signing Request (CSR) parsing
maclobdell 0:f7c60d3e7b8a 3 *
maclobdell 0:f7c60d3e7b8a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
maclobdell 0:f7c60d3e7b8a 5 * SPDX-License-Identifier: Apache-2.0
maclobdell 0:f7c60d3e7b8a 6 *
maclobdell 0:f7c60d3e7b8a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
maclobdell 0:f7c60d3e7b8a 8 * not use this file except in compliance with the License.
maclobdell 0:f7c60d3e7b8a 9 * You may obtain a copy of the License at
maclobdell 0:f7c60d3e7b8a 10 *
maclobdell 0:f7c60d3e7b8a 11 * http://www.apache.org/licenses/LICENSE-2.0
maclobdell 0:f7c60d3e7b8a 12 *
maclobdell 0:f7c60d3e7b8a 13 * Unless required by applicable law or agreed to in writing, software
maclobdell 0:f7c60d3e7b8a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
maclobdell 0:f7c60d3e7b8a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
maclobdell 0:f7c60d3e7b8a 16 * See the License for the specific language governing permissions and
maclobdell 0:f7c60d3e7b8a 17 * limitations under the License.
maclobdell 0:f7c60d3e7b8a 18 *
maclobdell 0:f7c60d3e7b8a 19 * This file is part of mbed TLS (https://tls.mbed.org)
maclobdell 0:f7c60d3e7b8a 20 */
maclobdell 0:f7c60d3e7b8a 21 /*
maclobdell 0:f7c60d3e7b8a 22 * The ITU-T X.509 standard defines a certificate format for PKI.
maclobdell 0:f7c60d3e7b8a 23 *
maclobdell 0:f7c60d3e7b8a 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
maclobdell 0:f7c60d3e7b8a 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
maclobdell 0:f7c60d3e7b8a 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
maclobdell 0:f7c60d3e7b8a 27 *
maclobdell 0:f7c60d3e7b8a 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
maclobdell 0:f7c60d3e7b8a 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
maclobdell 0:f7c60d3e7b8a 30 */
maclobdell 0:f7c60d3e7b8a 31
maclobdell 0:f7c60d3e7b8a 32 #if !defined(MBEDTLS_CONFIG_FILE)
maclobdell 0:f7c60d3e7b8a 33 #include "mbedtls/config.h"
maclobdell 0:f7c60d3e7b8a 34 #else
maclobdell 0:f7c60d3e7b8a 35 #include MBEDTLS_CONFIG_FILE
maclobdell 0:f7c60d3e7b8a 36 #endif
maclobdell 0:f7c60d3e7b8a 37
maclobdell 0:f7c60d3e7b8a 38 #if defined(MBEDTLS_X509_CSR_PARSE_C)
maclobdell 0:f7c60d3e7b8a 39
maclobdell 0:f7c60d3e7b8a 40 #include "mbedtls/x509_csr.h"
maclobdell 0:f7c60d3e7b8a 41 #include "mbedtls/oid.h"
maclobdell 0:f7c60d3e7b8a 42
maclobdell 0:f7c60d3e7b8a 43 #include <string.h>
maclobdell 0:f7c60d3e7b8a 44
maclobdell 0:f7c60d3e7b8a 45 #if defined(MBEDTLS_PEM_PARSE_C)
maclobdell 0:f7c60d3e7b8a 46 #include "mbedtls/pem.h"
maclobdell 0:f7c60d3e7b8a 47 #endif
maclobdell 0:f7c60d3e7b8a 48
maclobdell 0:f7c60d3e7b8a 49 #if defined(MBEDTLS_PLATFORM_C)
maclobdell 0:f7c60d3e7b8a 50 #include "mbedtls/platform.h"
maclobdell 0:f7c60d3e7b8a 51 #else
maclobdell 0:f7c60d3e7b8a 52 #include <stdlib.h>
maclobdell 0:f7c60d3e7b8a 53 #include <stdio.h>
maclobdell 0:f7c60d3e7b8a 54 #define mbedtls_free free
maclobdell 0:f7c60d3e7b8a 55 #define mbedtls_calloc calloc
maclobdell 0:f7c60d3e7b8a 56 #define mbedtls_snprintf snprintf
maclobdell 0:f7c60d3e7b8a 57 #endif
maclobdell 0:f7c60d3e7b8a 58
maclobdell 0:f7c60d3e7b8a 59 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
maclobdell 0:f7c60d3e7b8a 60 #include <stdio.h>
maclobdell 0:f7c60d3e7b8a 61 #endif
maclobdell 0:f7c60d3e7b8a 62
maclobdell 0:f7c60d3e7b8a 63 /* Implementation that should never be optimized out by the compiler */
maclobdell 0:f7c60d3e7b8a 64 static void mbedtls_zeroize( void *v, size_t n ) {
maclobdell 0:f7c60d3e7b8a 65 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
maclobdell 0:f7c60d3e7b8a 66 }
maclobdell 0:f7c60d3e7b8a 67
maclobdell 0:f7c60d3e7b8a 68 /*
maclobdell 0:f7c60d3e7b8a 69 * Version ::= INTEGER { v1(0) }
maclobdell 0:f7c60d3e7b8a 70 */
maclobdell 0:f7c60d3e7b8a 71 static int x509_csr_get_version( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 72 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 73 int *ver )
maclobdell 0:f7c60d3e7b8a 74 {
maclobdell 0:f7c60d3e7b8a 75 int ret;
maclobdell 0:f7c60d3e7b8a 76
maclobdell 0:f7c60d3e7b8a 77 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 78 {
maclobdell 0:f7c60d3e7b8a 79 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
maclobdell 0:f7c60d3e7b8a 80 {
maclobdell 0:f7c60d3e7b8a 81 *ver = 0;
maclobdell 0:f7c60d3e7b8a 82 return( 0 );
maclobdell 0:f7c60d3e7b8a 83 }
maclobdell 0:f7c60d3e7b8a 84
maclobdell 0:f7c60d3e7b8a 85 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
maclobdell 0:f7c60d3e7b8a 86 }
maclobdell 0:f7c60d3e7b8a 87
maclobdell 0:f7c60d3e7b8a 88 return( 0 );
maclobdell 0:f7c60d3e7b8a 89 }
maclobdell 0:f7c60d3e7b8a 90
maclobdell 0:f7c60d3e7b8a 91 /*
maclobdell 0:f7c60d3e7b8a 92 * Parse a CSR in DER format
maclobdell 0:f7c60d3e7b8a 93 */
maclobdell 0:f7c60d3e7b8a 94 int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
maclobdell 0:f7c60d3e7b8a 95 const unsigned char *buf, size_t buflen )
maclobdell 0:f7c60d3e7b8a 96 {
maclobdell 0:f7c60d3e7b8a 97 int ret;
maclobdell 0:f7c60d3e7b8a 98 size_t len;
maclobdell 0:f7c60d3e7b8a 99 unsigned char *p, *end;
maclobdell 0:f7c60d3e7b8a 100 mbedtls_x509_buf sig_params;
maclobdell 0:f7c60d3e7b8a 101
maclobdell 0:f7c60d3e7b8a 102 memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
maclobdell 0:f7c60d3e7b8a 103
maclobdell 0:f7c60d3e7b8a 104 /*
maclobdell 0:f7c60d3e7b8a 105 * Check for valid input
maclobdell 0:f7c60d3e7b8a 106 */
maclobdell 0:f7c60d3e7b8a 107 if( csr == NULL || buf == NULL )
maclobdell 0:f7c60d3e7b8a 108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 109
maclobdell 0:f7c60d3e7b8a 110 mbedtls_x509_csr_init( csr );
maclobdell 0:f7c60d3e7b8a 111
maclobdell 0:f7c60d3e7b8a 112 /*
maclobdell 0:f7c60d3e7b8a 113 * first copy the raw DER data
maclobdell 0:f7c60d3e7b8a 114 */
maclobdell 0:f7c60d3e7b8a 115 p = mbedtls_calloc( 1, len = buflen );
maclobdell 0:f7c60d3e7b8a 116
maclobdell 0:f7c60d3e7b8a 117 if( p == NULL )
maclobdell 0:f7c60d3e7b8a 118 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
maclobdell 0:f7c60d3e7b8a 119
maclobdell 0:f7c60d3e7b8a 120 memcpy( p, buf, buflen );
maclobdell 0:f7c60d3e7b8a 121
maclobdell 0:f7c60d3e7b8a 122 csr->raw.p = p;
maclobdell 0:f7c60d3e7b8a 123 csr->raw.len = len;
maclobdell 0:f7c60d3e7b8a 124 end = p + len;
maclobdell 0:f7c60d3e7b8a 125
maclobdell 0:f7c60d3e7b8a 126 /*
maclobdell 0:f7c60d3e7b8a 127 * CertificationRequest ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 128 * certificationRequestInfo CertificationRequestInfo,
maclobdell 0:f7c60d3e7b8a 129 * signatureAlgorithm AlgorithmIdentifier,
maclobdell 0:f7c60d3e7b8a 130 * signature BIT STRING
maclobdell 0:f7c60d3e7b8a 131 * }
maclobdell 0:f7c60d3e7b8a 132 */
maclobdell 0:f7c60d3e7b8a 133 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 134 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 135 {
maclobdell 0:f7c60d3e7b8a 136 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 137 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
maclobdell 0:f7c60d3e7b8a 138 }
maclobdell 0:f7c60d3e7b8a 139
maclobdell 0:f7c60d3e7b8a 140 if( len != (size_t) ( end - p ) )
maclobdell 0:f7c60d3e7b8a 141 {
maclobdell 0:f7c60d3e7b8a 142 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 143 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
maclobdell 0:f7c60d3e7b8a 144 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 145 }
maclobdell 0:f7c60d3e7b8a 146
maclobdell 0:f7c60d3e7b8a 147 /*
maclobdell 0:f7c60d3e7b8a 148 * CertificationRequestInfo ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 149 */
maclobdell 0:f7c60d3e7b8a 150 csr->cri.p = p;
maclobdell 0:f7c60d3e7b8a 151
maclobdell 0:f7c60d3e7b8a 152 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 153 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 154 {
maclobdell 0:f7c60d3e7b8a 155 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 156 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
maclobdell 0:f7c60d3e7b8a 157 }
maclobdell 0:f7c60d3e7b8a 158
maclobdell 0:f7c60d3e7b8a 159 end = p + len;
maclobdell 0:f7c60d3e7b8a 160 csr->cri.len = end - csr->cri.p;
maclobdell 0:f7c60d3e7b8a 161
maclobdell 0:f7c60d3e7b8a 162 /*
maclobdell 0:f7c60d3e7b8a 163 * Version ::= INTEGER { v1(0) }
maclobdell 0:f7c60d3e7b8a 164 */
maclobdell 0:f7c60d3e7b8a 165 if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 166 {
maclobdell 0:f7c60d3e7b8a 167 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 168 return( ret );
maclobdell 0:f7c60d3e7b8a 169 }
maclobdell 0:f7c60d3e7b8a 170
maclobdell 0:f7c60d3e7b8a 171 csr->version++;
maclobdell 0:f7c60d3e7b8a 172
maclobdell 0:f7c60d3e7b8a 173 if( csr->version != 1 )
maclobdell 0:f7c60d3e7b8a 174 {
maclobdell 0:f7c60d3e7b8a 175 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 176 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
maclobdell 0:f7c60d3e7b8a 177 }
maclobdell 0:f7c60d3e7b8a 178
maclobdell 0:f7c60d3e7b8a 179 /*
maclobdell 0:f7c60d3e7b8a 180 * subject Name
maclobdell 0:f7c60d3e7b8a 181 */
maclobdell 0:f7c60d3e7b8a 182 csr->subject_raw.p = p;
maclobdell 0:f7c60d3e7b8a 183
maclobdell 0:f7c60d3e7b8a 184 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 185 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 186 {
maclobdell 0:f7c60d3e7b8a 187 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 188 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
maclobdell 0:f7c60d3e7b8a 189 }
maclobdell 0:f7c60d3e7b8a 190
maclobdell 0:f7c60d3e7b8a 191 if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 192 {
maclobdell 0:f7c60d3e7b8a 193 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 194 return( ret );
maclobdell 0:f7c60d3e7b8a 195 }
maclobdell 0:f7c60d3e7b8a 196
maclobdell 0:f7c60d3e7b8a 197 csr->subject_raw.len = p - csr->subject_raw.p;
maclobdell 0:f7c60d3e7b8a 198
maclobdell 0:f7c60d3e7b8a 199 /*
maclobdell 0:f7c60d3e7b8a 200 * subjectPKInfo SubjectPublicKeyInfo
maclobdell 0:f7c60d3e7b8a 201 */
maclobdell 0:f7c60d3e7b8a 202 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 203 {
maclobdell 0:f7c60d3e7b8a 204 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 205 return( ret );
maclobdell 0:f7c60d3e7b8a 206 }
maclobdell 0:f7c60d3e7b8a 207
maclobdell 0:f7c60d3e7b8a 208 /*
maclobdell 0:f7c60d3e7b8a 209 * attributes [0] Attributes
maclobdell 0:f7c60d3e7b8a 210 */
maclobdell 0:f7c60d3e7b8a 211 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 212 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 213 {
maclobdell 0:f7c60d3e7b8a 214 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 215 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
maclobdell 0:f7c60d3e7b8a 216 }
maclobdell 0:f7c60d3e7b8a 217 // TODO Parse Attributes / extension requests
maclobdell 0:f7c60d3e7b8a 218
maclobdell 0:f7c60d3e7b8a 219 p += len;
maclobdell 0:f7c60d3e7b8a 220
maclobdell 0:f7c60d3e7b8a 221 end = csr->raw.p + csr->raw.len;
maclobdell 0:f7c60d3e7b8a 222
maclobdell 0:f7c60d3e7b8a 223 /*
maclobdell 0:f7c60d3e7b8a 224 * signatureAlgorithm AlgorithmIdentifier,
maclobdell 0:f7c60d3e7b8a 225 * signature BIT STRING
maclobdell 0:f7c60d3e7b8a 226 */
maclobdell 0:f7c60d3e7b8a 227 if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 228 {
maclobdell 0:f7c60d3e7b8a 229 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 230 return( ret );
maclobdell 0:f7c60d3e7b8a 231 }
maclobdell 0:f7c60d3e7b8a 232
maclobdell 0:f7c60d3e7b8a 233 if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
maclobdell 0:f7c60d3e7b8a 234 &csr->sig_md, &csr->sig_pk,
maclobdell 0:f7c60d3e7b8a 235 &csr->sig_opts ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 236 {
maclobdell 0:f7c60d3e7b8a 237 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 238 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
maclobdell 0:f7c60d3e7b8a 239 }
maclobdell 0:f7c60d3e7b8a 240
maclobdell 0:f7c60d3e7b8a 241 if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 242 {
maclobdell 0:f7c60d3e7b8a 243 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 244 return( ret );
maclobdell 0:f7c60d3e7b8a 245 }
maclobdell 0:f7c60d3e7b8a 246
maclobdell 0:f7c60d3e7b8a 247 if( p != end )
maclobdell 0:f7c60d3e7b8a 248 {
maclobdell 0:f7c60d3e7b8a 249 mbedtls_x509_csr_free( csr );
maclobdell 0:f7c60d3e7b8a 250 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
maclobdell 0:f7c60d3e7b8a 251 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 252 }
maclobdell 0:f7c60d3e7b8a 253
maclobdell 0:f7c60d3e7b8a 254 return( 0 );
maclobdell 0:f7c60d3e7b8a 255 }
maclobdell 0:f7c60d3e7b8a 256
maclobdell 0:f7c60d3e7b8a 257 /*
maclobdell 0:f7c60d3e7b8a 258 * Parse a CSR, allowing for PEM or raw DER encoding
maclobdell 0:f7c60d3e7b8a 259 */
maclobdell 0:f7c60d3e7b8a 260 int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen )
maclobdell 0:f7c60d3e7b8a 261 {
maclobdell 0:f7c60d3e7b8a 262 int ret;
maclobdell 0:f7c60d3e7b8a 263 #if defined(MBEDTLS_PEM_PARSE_C)
maclobdell 0:f7c60d3e7b8a 264 size_t use_len;
maclobdell 0:f7c60d3e7b8a 265 mbedtls_pem_context pem;
maclobdell 0:f7c60d3e7b8a 266 #endif
maclobdell 0:f7c60d3e7b8a 267
maclobdell 0:f7c60d3e7b8a 268 /*
maclobdell 0:f7c60d3e7b8a 269 * Check for valid input
maclobdell 0:f7c60d3e7b8a 270 */
maclobdell 0:f7c60d3e7b8a 271 if( csr == NULL || buf == NULL )
maclobdell 0:f7c60d3e7b8a 272 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 273
maclobdell 0:f7c60d3e7b8a 274 #if defined(MBEDTLS_PEM_PARSE_C)
maclobdell 0:f7c60d3e7b8a 275 mbedtls_pem_init( &pem );
maclobdell 0:f7c60d3e7b8a 276
maclobdell 0:f7c60d3e7b8a 277 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
maclobdell 0:f7c60d3e7b8a 278 if( buflen == 0 || buf[buflen - 1] != '\0' )
maclobdell 0:f7c60d3e7b8a 279 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
maclobdell 0:f7c60d3e7b8a 280 else
maclobdell 0:f7c60d3e7b8a 281 ret = mbedtls_pem_read_buffer( &pem,
maclobdell 0:f7c60d3e7b8a 282 "-----BEGIN CERTIFICATE REQUEST-----",
maclobdell 0:f7c60d3e7b8a 283 "-----END CERTIFICATE REQUEST-----",
maclobdell 0:f7c60d3e7b8a 284 buf, NULL, 0, &use_len );
maclobdell 0:f7c60d3e7b8a 285
maclobdell 0:f7c60d3e7b8a 286 if( ret == 0 )
maclobdell 0:f7c60d3e7b8a 287 {
maclobdell 0:f7c60d3e7b8a 288 /*
maclobdell 0:f7c60d3e7b8a 289 * Was PEM encoded, parse the result
maclobdell 0:f7c60d3e7b8a 290 */
maclobdell 0:f7c60d3e7b8a 291 if( ( ret = mbedtls_x509_csr_parse_der( csr, pem.buf, pem.buflen ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 292 return( ret );
maclobdell 0:f7c60d3e7b8a 293
maclobdell 0:f7c60d3e7b8a 294 mbedtls_pem_free( &pem );
maclobdell 0:f7c60d3e7b8a 295 return( 0 );
maclobdell 0:f7c60d3e7b8a 296 }
maclobdell 0:f7c60d3e7b8a 297 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
maclobdell 0:f7c60d3e7b8a 298 {
maclobdell 0:f7c60d3e7b8a 299 mbedtls_pem_free( &pem );
maclobdell 0:f7c60d3e7b8a 300 return( ret );
maclobdell 0:f7c60d3e7b8a 301 }
maclobdell 0:f7c60d3e7b8a 302 else
maclobdell 0:f7c60d3e7b8a 303 #endif /* MBEDTLS_PEM_PARSE_C */
maclobdell 0:f7c60d3e7b8a 304 return( mbedtls_x509_csr_parse_der( csr, buf, buflen ) );
maclobdell 0:f7c60d3e7b8a 305 }
maclobdell 0:f7c60d3e7b8a 306
maclobdell 0:f7c60d3e7b8a 307 #if defined(MBEDTLS_FS_IO)
maclobdell 0:f7c60d3e7b8a 308 /*
maclobdell 0:f7c60d3e7b8a 309 * Load a CSR into the structure
maclobdell 0:f7c60d3e7b8a 310 */
maclobdell 0:f7c60d3e7b8a 311 int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path )
maclobdell 0:f7c60d3e7b8a 312 {
maclobdell 0:f7c60d3e7b8a 313 int ret;
maclobdell 0:f7c60d3e7b8a 314 size_t n;
maclobdell 0:f7c60d3e7b8a 315 unsigned char *buf;
maclobdell 0:f7c60d3e7b8a 316
maclobdell 0:f7c60d3e7b8a 317 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 318 return( ret );
maclobdell 0:f7c60d3e7b8a 319
maclobdell 0:f7c60d3e7b8a 320 ret = mbedtls_x509_csr_parse( csr, buf, n );
maclobdell 0:f7c60d3e7b8a 321
maclobdell 0:f7c60d3e7b8a 322 mbedtls_zeroize( buf, n );
maclobdell 0:f7c60d3e7b8a 323 mbedtls_free( buf );
maclobdell 0:f7c60d3e7b8a 324
maclobdell 0:f7c60d3e7b8a 325 return( ret );
maclobdell 0:f7c60d3e7b8a 326 }
maclobdell 0:f7c60d3e7b8a 327 #endif /* MBEDTLS_FS_IO */
maclobdell 0:f7c60d3e7b8a 328
maclobdell 0:f7c60d3e7b8a 329 #define BEFORE_COLON 14
maclobdell 0:f7c60d3e7b8a 330 #define BC "14"
maclobdell 0:f7c60d3e7b8a 331 /*
maclobdell 0:f7c60d3e7b8a 332 * Return an informational string about the CSR.
maclobdell 0:f7c60d3e7b8a 333 */
maclobdell 0:f7c60d3e7b8a 334 int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
maclobdell 0:f7c60d3e7b8a 335 const mbedtls_x509_csr *csr )
maclobdell 0:f7c60d3e7b8a 336 {
maclobdell 0:f7c60d3e7b8a 337 int ret;
maclobdell 0:f7c60d3e7b8a 338 size_t n;
maclobdell 0:f7c60d3e7b8a 339 char *p;
maclobdell 0:f7c60d3e7b8a 340 char key_size_str[BEFORE_COLON];
maclobdell 0:f7c60d3e7b8a 341
maclobdell 0:f7c60d3e7b8a 342 p = buf;
maclobdell 0:f7c60d3e7b8a 343 n = size;
maclobdell 0:f7c60d3e7b8a 344
maclobdell 0:f7c60d3e7b8a 345 ret = mbedtls_snprintf( p, n, "%sCSR version : %d",
maclobdell 0:f7c60d3e7b8a 346 prefix, csr->version );
maclobdell 0:f7c60d3e7b8a 347 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 348
maclobdell 0:f7c60d3e7b8a 349 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
maclobdell 0:f7c60d3e7b8a 350 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 351 ret = mbedtls_x509_dn_gets( p, n, &csr->subject );
maclobdell 0:f7c60d3e7b8a 352 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 353
maclobdell 0:f7c60d3e7b8a 354 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
maclobdell 0:f7c60d3e7b8a 355 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 356
maclobdell 0:f7c60d3e7b8a 357 ret = mbedtls_x509_sig_alg_gets( p, n, &csr->sig_oid, csr->sig_pk, csr->sig_md,
maclobdell 0:f7c60d3e7b8a 358 csr->sig_opts );
maclobdell 0:f7c60d3e7b8a 359 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 360
maclobdell 0:f7c60d3e7b8a 361 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
maclobdell 0:f7c60d3e7b8a 362 mbedtls_pk_get_name( &csr->pk ) ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 363 {
maclobdell 0:f7c60d3e7b8a 364 return( ret );
maclobdell 0:f7c60d3e7b8a 365 }
maclobdell 0:f7c60d3e7b8a 366
maclobdell 0:f7c60d3e7b8a 367 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits\n", prefix, key_size_str,
maclobdell 0:f7c60d3e7b8a 368 (int) mbedtls_pk_get_bitlen( &csr->pk ) );
maclobdell 0:f7c60d3e7b8a 369 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 370
maclobdell 0:f7c60d3e7b8a 371 return( (int) ( size - n ) );
maclobdell 0:f7c60d3e7b8a 372 }
maclobdell 0:f7c60d3e7b8a 373
maclobdell 0:f7c60d3e7b8a 374 /*
maclobdell 0:f7c60d3e7b8a 375 * Initialize a CSR
maclobdell 0:f7c60d3e7b8a 376 */
maclobdell 0:f7c60d3e7b8a 377 void mbedtls_x509_csr_init( mbedtls_x509_csr *csr )
maclobdell 0:f7c60d3e7b8a 378 {
maclobdell 0:f7c60d3e7b8a 379 memset( csr, 0, sizeof(mbedtls_x509_csr) );
maclobdell 0:f7c60d3e7b8a 380 }
maclobdell 0:f7c60d3e7b8a 381
maclobdell 0:f7c60d3e7b8a 382 /*
maclobdell 0:f7c60d3e7b8a 383 * Unallocate all CSR data
maclobdell 0:f7c60d3e7b8a 384 */
maclobdell 0:f7c60d3e7b8a 385 void mbedtls_x509_csr_free( mbedtls_x509_csr *csr )
maclobdell 0:f7c60d3e7b8a 386 {
maclobdell 0:f7c60d3e7b8a 387 mbedtls_x509_name *name_cur;
maclobdell 0:f7c60d3e7b8a 388 mbedtls_x509_name *name_prv;
maclobdell 0:f7c60d3e7b8a 389
maclobdell 0:f7c60d3e7b8a 390 if( csr == NULL )
maclobdell 0:f7c60d3e7b8a 391 return;
maclobdell 0:f7c60d3e7b8a 392
maclobdell 0:f7c60d3e7b8a 393 mbedtls_pk_free( &csr->pk );
maclobdell 0:f7c60d3e7b8a 394
maclobdell 0:f7c60d3e7b8a 395 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
maclobdell 0:f7c60d3e7b8a 396 mbedtls_free( csr->sig_opts );
maclobdell 0:f7c60d3e7b8a 397 #endif
maclobdell 0:f7c60d3e7b8a 398
maclobdell 0:f7c60d3e7b8a 399 name_cur = csr->subject.next;
maclobdell 0:f7c60d3e7b8a 400 while( name_cur != NULL )
maclobdell 0:f7c60d3e7b8a 401 {
maclobdell 0:f7c60d3e7b8a 402 name_prv = name_cur;
maclobdell 0:f7c60d3e7b8a 403 name_cur = name_cur->next;
maclobdell 0:f7c60d3e7b8a 404 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
maclobdell 0:f7c60d3e7b8a 405 mbedtls_free( name_prv );
maclobdell 0:f7c60d3e7b8a 406 }
maclobdell 0:f7c60d3e7b8a 407
maclobdell 0:f7c60d3e7b8a 408 if( csr->raw.p != NULL )
maclobdell 0:f7c60d3e7b8a 409 {
maclobdell 0:f7c60d3e7b8a 410 mbedtls_zeroize( csr->raw.p, csr->raw.len );
maclobdell 0:f7c60d3e7b8a 411 mbedtls_free( csr->raw.p );
maclobdell 0:f7c60d3e7b8a 412 }
maclobdell 0:f7c60d3e7b8a 413
maclobdell 0:f7c60d3e7b8a 414 mbedtls_zeroize( csr, sizeof( mbedtls_x509_csr ) );
maclobdell 0:f7c60d3e7b8a 415 }
maclobdell 0:f7c60d3e7b8a 416
maclobdell 0:f7c60d3e7b8a 417 #endif /* MBEDTLS_X509_CSR_PARSE_C */